In 1579 he formed the Confraternity of Christian Doctrine, and published a compendium of Christian doctrine that remained in use until the 19th century. He died from a disease caught while tending plague victims. By the deliberate policy of the founder, the Clerks have never had more than 15 churches, and today form only a very small congregation. The arms of the order are azure, Our LadyAssumed into Heaven; and its badge and seal the monogram of the Mother of God in Greek characters.